(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window) * FTSE 100 up 1.0%, FTSE 250 adds 0.8% Oct 7 (Reuters) - London’s FTSE 100 jumped on Thursday, led by gains in travel and heavyweight mining stocks, while recruitment firm Robert Walters rose sharply on strong profit forecasts. The blue-chip FTSE 100 gained 1% by 0705 GMT, with miners Glencore, Anglo-American and Rio Tinto among the top boosts. Miners added 1.8%, tracking higher metal prices. Oil major Royal Dutch Shell rose 0.5% after saying it expects significant cash boost in third-quarter revenue due to soaring gas and power prices. Homebuilder stocks climbed 0.7% after mortgage lender Halifax said British house prices rose by the most in almost 15 years in September. The domestically focussed mid-cap index advanced 0.8%, with travel stocks among the top performers. Shares of online auto retailer Pendragon PLC climbed 4% after reporting a strong third-quarter performance. Workspace climbed 2% after it said utilisation of its centres by the end of September peaked at 56% of pre-COVID levels mid-week. British recruitment firm Robert Walters rose 2.6% after it said its annual profit would be ahead of its expectations as it benefits from a hot jobs market. (Reporting by Bansari Mayur Kamdar; Editing by Subhranshu Sahu)